A glacier may look white from a distance and yet reveal an intense blue in a crack or in a newly detached wall. In some cases, the color becomes turquoise. The explanation is in the way the light passes through the ice. Blue glaciers contain very compact ice sectors in which the light can travel a considerable distance. During that journey, different wavelengths do not behave in the same way: the reddish ones are absorbed more easily, while the …
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A glacier may look white from a distance and yet reveal an intense blue in a crack or in a newly detached wall. In some cases, the color becomes turquoise. The explanation is in the way the light passes through the ice. Blue glaciers contain very compact ice sectors in which the light can travel a considerable distance. During that journey, different wavelengths do not behave in the same way: the reddish ones are absorbed more easily, while the …